Q1: 1. When a force is applied to a system of particles, which of the following remains constant?

• A) Linear momentum
• B) Angular momentum
• C) Kinetic energy
• D) Potential energy

Q2: 2. In a rotating system of particles, the moment of inertia depends on which of the following factors?

• A) Angular velocity
• B) Mass of the particles
• C) Radius of rotation
• D) All of the above

Q3: 3. A diver performs a somersault in the air. Which physical quantity is conserved during this motion?

• A) Angular momentum
• B) Linear momentum
• C) Kinetic energy
• D) Potential energy

Q4: 4. What happens to the rotational kinetic energy of a spinning top when its angular velocity is doubled?

• A) Rotational kinetic energy is halved
• B) Rotational kinetic energy is quadrupled
• C) Rotational kinetic energy is doubled
• D) Rotational kinetic energy remains the same

Q5: 5. The torque applied to a system of particles is directly proportional to which of the following?

• A) Moment of inertia
• B) Angular acceleration
• C) Radius of rotation
• D) None of the above

Q6: 6. A figure skater pulls her arms closer to her body while spinning. What effect does this have on her angular velocity?

• A) Angular velocity increases
• B) Angular velocity decreases
• C) Angular velocity remains the same
• D) Angular velocity becomes zero

Q7: 7. Which law of motion is most applicable to the motion of a system of particles?

• A) Newton's First Law
• B) Newton's Second Law
• C) Newton's Third Law
• D) Law of Gravitation

Q8: 8. In a rotating system, the angular acceleration is directly proportional to which of the following?

• A) Torque
• B) Moment of inertia
• C) Angular velocity
• D) Radius of rotation

Q9: 9. A car is turning around a curved road. What force is responsible for keeping the car in its circular path?

• A) Frictional force
• B) Centripetal force
• C) Gravitational force
• D) Tension force

Q10: 10. Which of the following is an example of rotational motion in everyday life?

• A) A car moving in a straight line
• B) A spinning top
• C) A ball rolling down a slope
• D) A pendulum swinging back and forth

Q11: 11. The rotational analog of force in linear motion is

• A) Torque
• B) Inertia
• C) Momentum
• D) Velocity

Q12: 12. A Ferris wheel rotates at a constant angular velocity. What can be said about the net torque acting on the system?

• A) Net torque is zero
• B) Net torque is constant
• C) Net torque is increasing
• D) Net torque is decreasing

Q13: 13. When an ice skater extends her arms while spinning, what effect does it have on her rotational inertia?

• A) Rotational inertia increases
• B) Rotational inertia decreases
• C) Rotational inertia remains the same
• D) Rotational inertia becomes zero

Q14: 14. Which of the following is a vector quantity in rotational motion?

• A) Angular velocity
• B) Angular acceleration
• C) Rotational kinetic energy
• D) Moment of inertia

Q15: 15. The product of moment of inertia and angular velocity is a measure of

• A) Angular acceleration
• B) Torque
• C) Angular momentum
• D) Rotational kinetic energy

Q16: 16. A spinning wheel has a larger radius than another wheel. Which wheel has a greater moment of inertia?

• A) The wheel with larger radius
• B) The wheel with smaller radius
• C) Both wheels have the same moment of inertia
• D) Cannot be determined

Q17: 17. Which of the following is a real-life example of conservation of angular momentum?

• A) Ice skater spinning faster by pulling arms in
• B) Pendulum swinging back and forth
• C) A car moving in a circular path
• D) A ball rolling down a slope

Q18: 18. The rotational analog of mass in linear motion is

• A) Torque
• B) Angular velocity
• C) Moment of inertia
• D) Angular momentum

Q19: 19. Two disks of different masses are rotating with the same angular velocity. Which disk has more rotational kinetic energy?

• A) The disk with greater mass
• B) The disk with smaller mass
• C) Both disks have the same rotational kinetic energy
• D) Cannot be determined

Q20: 20. An object is rolling down an inclined plane. Which type of energy is conserved during its motion?

• A) Potential energy
• B) Kinetic energy
• C) Rotational kinetic energy
• D) Angular momentum

Q21: 21. In a system of particles, the total momentum is conserved if

• A) No external force acts on the system
• B) The system is at rest
• C) There is no friction in the system
• D) The system is rotating at a constant speed

Q22: 22. If a force is applied to a rotating object in the direction opposite to its rotation, what effect does it have on the object's angular velocity?

• A) Angular velocity increases
• B) Angular velocity decreases
• C) Angular velocity remains the same
• D) Angular velocity becomes zero

Q23: 23. When a rigid body rotates about a fixed axis, the angular acceleration is directly proportional to

• A) Torque
• B) Moment of inertia
• C) Angular velocity
• D) Radius of rotation

Q24: 24. A spinning top is slowing down due to friction. What happens to its rotational kinetic energy?

• A) Rotational kinetic energy decreases
• B) Rotational kinetic energy increases
• C) Rotational kinetic energy remains the same
• D) Rotational kinetic energy becomes zero

Q25: 25. Which of the following statements about the center of mass of a system of particles is correct?

• A) The center of mass is always located at the geometric center
• B) The center of mass is affected by the shapes and masses of the particles
• C) The center of mass is a fixed point in space
• D) The center of mass has no relation to the motion of the system